RockStar® HDC - Kit. RockStar® HDC - Kits are heavy-duty connector kits in size 4 with 1 pole, screw connection, 500 V, and 16 A, metric. HDC - Kits are standardized sets for creating a complete connector. They typically consist of pin insert, socket insert, plug housing, mounting housing, and cable gland. Weidmüller offers a range of common connector combinations with metric or PG cable entry threads. The Push-In connection technology is a direct plugging technique that allows the pre-treated conductor to be inserted directly into the conductor connection level without additional tools. PUSH IN technology.